I am not sure what could hit at the self-interest of the 18-29M demographic other than the Selective Service.
If you spend a quarter of your time discussing transgender athletes or unisex bathrooms 99% of people don't have a personal stake in that. In other words, the Dems aren't doing the fundamental job of politicking, which is to engage with their constituents on the topics that matter to them directly.
> The Joe Rogans/Logan Pauls/Elon Musks/Tiktok/Podcast bros are doing serious damage to that demographic.
The attempt was immediately killed upon the next sentence.
The Dems failed with this kind of thinking: It's a prescriptivist ideology that thinks it knows better and that doesn't need to actually listen to the concerns of who they're diagnosing.
How to start off on a better footing? Start with:
"They're right about their feelings, but try to find the genuine sources for them and *don't* snark back."
The last 3 words are important to the point that it needs to be drilled in: *DON'T SNARK BACK.*
Engage in their language and point to alternate sources of their frustrations. Bernie was great at this, and knew to engage with them in a supportive manner, whilst still pointing out new sources for their frustrations.